4WVG:
reference: Peptide binding to a bacterial signal peptidase visualized by peptide tethering and carrier-driven crystallization., Ting YT, Harris PW, Batot G, Brimble MA, Baker EN, Young PG, IUCrJ. 2016 Jan 1;3(Pt 1):10-9. doi: 10.1107/S2052252515019971. eCollection 2016 , Jan 1. PMID: 26870377

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